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Modprobe functionality is required both within first stage init and also
as a standalone binary. Create a library for this using and extending
the logic in modalias_handler.cpp.
First stage init will attempt to load modules from /lib/modules.
Bug: 129780532
Change-Id: Ie3582358fd839c2f64e1b386b30ed551a86aef5d
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Now that Result<T> is actually expected<T, ...>, and the expected
proposal states expected<void, ...> as the way to indicate an expected
object that returns either successfully with no object or an error,
let's move init's Result<Success> to the preferred Result<void>.
Bug: 132145659
Test: boot, init unit tests
Change-Id: Ib2f98396d8e6e274f95a496fcdfd8341f77585ee
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* Use more efficient overloaded string methods.
Bug: 30411878
Test: build with WITH_TIDY=1
Change-Id: I449347565f83fae14ea337d0b3173beb5a56e0ca
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Some devices have modules.alias and modules.dep for modprobe and other
purposes but do not want to opt into ueventd auto loading their
modules. Therefore we add a flag that can be added to ueventd
configuration files to opt into this behavior.
Bug: 111916071
Bug: 112048758
Test: check that modules are loaded with this opt-in
Test: check that modules are not loaded without this opt-in
Change-Id: Ifb281b273059b4671eea1ca5bc726c9e79f3adfb
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For some platforms it is not known at build time what devices
will be attached at runtime. Building into the kernel or pre-loading
at init all the modules that could be needed would unnecessary bloat
the kernel. The solution is dynamic kernel module loading.
The kernel will generate uevents when devices are added, userspace
should monitor for these events and load the compatible modules.
The init process already monitors for uevents, add here the ability
to respond to modalias events and preform the correct action.
Adding this to init is preferred over an external program as we
can read and process the module alias and dependency files once,
instead of for each module needing to be loaded.
Test: Run on Beagle-X15, check all needed modules are loaded (lsmod)
Change-Id: I1b57d9aeb0a9770f309207183dc4bc2b7b905f14
Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
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